Optical imaging lens and electronic device comprising the same

Abstract

An optical imaging lens includes six lens elements. The object-side surface of the first lens element has a convex part in a vicinity of the periphery of the first lens element, the image-side surface of the second lens element has a concave part in a vicinity of the periphery of the first lens element, the object-side surface of the third lens element has a convex part in a vicinity of the optical axis, the image-side surface of the fourth lens element has a convex part in a vicinity of the periphery of the fourth lens element, the image-side surface of the fifth lens element has a concave part in a vicinity of the optical axis, and the sixth lens element has negative refractive power.

What is claimed is: 
     
         1 . An optical imaging lens, from an object side to an image side in order along an optical axis, comprising a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element, each of the first, second, third, fourth, fifth, and sixth lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side, the optical imaging lens does not include any lens element other than the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, and the sixth lens element, wherein:
 the object-side surface of the second lens element has a convex part in a vicinity of the optical axis; and   the image-side surface of the fourth lens element has a convex part in a vicinity of a periphery of the fourth lens element;   wherein EFL is an effective focal length of the optical imaging lens, T 1  is a thickness of the first lens element along the optical axis, an Abbe number of the sixth lens element is greater than an Abbe number of the fifth lens element, a thickness of the third lens element along the optical axis is greater than an air gap between the third lens element and the fourth lens element along the optical axis, the thickness of the third lens element along the optical axis is greater than an air gap between the fourth lens element and the fifth lens element along the optical axis, and the optical imaging lens satisfies the relation:   
       
         
           
             
               4.7 
               ≦ 
               
                 EFL 
                 / 
                 T 
                   
                 1. 
               
             
           
         
       
     
     
         2 . The optical imaging lens of  claim 1 , wherein G 12  is an air gap between the first lens element and the second lens element along the optical axis, G 34  is the air gap between the third lens element and the fourth lens element along the optical axis, T 6  is a thickness of the sixth lens element along the optical axis, and the optical imaging lens satisfies the relation: (G 12 +G 34 )/T 6 ≤1.7. 
     
     
         3 . The optical imaging lens of  claim 1 , wherein AAG is a sum of all air gaps from the first lens element to the sixth lens element along the optical axis, BFL is a distance between the image-side surface of the sixth lens element and an image plane along the optical axis, and the optical imaging lens satisfies the relation: AAG/BFL≤2.1. 
     
     
         4 . The optical imaging lens of  claim 1 , wherein T 2  is a thickness of the second lens element along the optical axis and the optical imaging lens satisfies the relation: 2.8≤EFL/T 2 . 
     
     
         5 . The optical imaging lens of  claim 1 , wherein BFL is a distance between the image-side surface of the sixth lens element and an image plane along the optical axis, T 2  is a thickness of the second lens element along the optical axis, and the optical imaging lens satisfies the relation: 1.4≤BFL/T 2 . 
     
     
         6 . The optical imaging lens of  claim 1 , wherein AAG is a sum of all five air gaps between each lens element from the first lens element to the sixth lens element along the optical axis, T 4  is a thickness of the fourth lens element along the optical axis, and the optical imaging lens satisfies the relation: AAG/T 4 ≤2.8. 
     
     
         7 . The optical imaging lens of  claim 1 , wherein G 23  is an air gap between the second lens element and the third lens element along the optical axis and the optical imaging lens satisfies the relation: 3.5≤EFL/G 23 ≤11. 
     
     
         8 . The optical imaging lens of  claim 1 , wherein an air gap between the second lens element and the third lens element along the optical axis is greater than the air gap between the fourth lens element and the fifth lens element along the optical axis. 
     
     
         9 . The optical imaging lens of  claim 1 , wherein T 1  is greater than the air gap between the third lens element and the fourth lens element along the optical axis. 
     
     
         10 . The optical imaging lens of  claim 1 , wherein T 1  is greater than the air gap between the fourth lens element and the fifth lens element along the optical axis. 
     
     
         11 . An optical imaging lens, from an object side to an image side in order along an optical axis, comprising a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element, each of the first, second, third, fourth, fifth, and sixth lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side, the optical imaging lens does not include any lens element other than the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, and the sixth lens element, wherein:
 the image-side surface of the fourth lens element has a convex part in a vicinity of a periphery of the fourth lens element; and   the object-side surface of the sixth lens element has a convex part in a vicinity of the optical axis;   wherein EFL is an effective focal length of the optical imaging lens, T 1  is a thickness of the first lens element along the optical axis, an Abbe number of the sixth lens element is greater than an Abbe number of the fifth lens element, a thickness of the third lens element along the optical axis is greater than an air gap between the third lens element and the fourth lens element along the optical axis, the thickness of the third lens element along the optical axis is greater than an air gap between the fourth lens element and the fifth lens element along the optical axis, and the optical imaging lens satisfies the relation:   
       
         
           
             
               4.7 
               ≦ 
               
                 EFL 
                 / 
                 T 
                   
                 1. 
               
             
           
         
       
     
     
         12 . The optical imaging lens of  claim 11 , wherein the object-side surface of the third lens element has a convex part in a vicinity of the optical axis. 
     
     
         13 . The optical imaging lens of  claim 11 , wherein the image-side surface of the fifth lens element has a concave part in a vicinity of the optical axis. 
     
     
         14 . The optical imaging lens of  claim 11 , wherein T 2  is a thickness of the second lens element along the optical axis, T 3  is the thickness of the third lens element along the optical axis, and the optical imaging lens satisfies the relation: T 2 /T 3 ≤1.5. 
     
     
         15 . The optical imaging lens of  claim 11 , wherein BFL is a distance between the image-side surface of the sixth lens element to an image plane along the optical axis, G 34  is the air gap between the third lens element and the fourth lens element along the optical axis, G 45  is the air gap between the fourth lens element and the fifth lens element along the optical axis, and the optical imaging lens satisfies the relation: 1.88≤BFL/(G 34 +G 45 )≤6. 
     
     
         16 . The optical imaging lens of  claim 11 , wherein BFL is a distance between the image-side surface of the sixth lens element and an image plane along the optical axis, and the optical imaging lens satisfies the relation: 1.5≤BFL/T 1 . 
     
     
         17 . The optical imaging lens of  claim 11 , wherein BFL is a distance between the image-side surface of the sixth lens element and an image plane along the optical axis, T 2  is a thickness of the second lens element along the optical axis, and the optical imaging lens satisfies the relation: 1.9≤BFL/T 2 . 
     
     
         18 . The optical imaging lens of  claim 11 , wherein AAG is a sum of all air gaps from the first lens element to the sixth lens element along the optical axis, T 3  is the thickness of the third lens element along the optical axis, and the optical imaging lens satisfies the relation: AAG/T 3 ≤3.3. 
     
     
         19 . The optical imaging lens of  claim 11 , wherein T 6  is a thickness of the sixth lens element along the optical axis, T 2  is a thickness of the second lens element along the optical axis, and the optical imaging lens satisfies the relation: 1.1≤T 6 /T 2 . 
     
     
         20 . The optical imaging lens of  claim 11 , wherein the thickness of the third lens element along the optical axis is greater than an air gap between the fifth lens element and the sixth lens element along the optical axis.